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    • Rahul Ponginan

      Please click here for a short but important announcement   03/26/17

      Dear Users Our Commercial and Academic users around the world can use these same forums here as before i.e. the Altair Support Forum , Commercial users from India with solver queries can go to the Solver Forum for India Commercial Users , Academic Users from India and AOC India Participants are requested to go to the Forum for India Academic Users and AOC India Participants , We will be tending to all queries in all the forums promptly as before, thank you for your understanding. 
    • Rahul Ponginan

      ユーザーフォーラムについて   10/22/17

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Found 10 results

  1. External Forces Work

    HI All, I am running a crash analysis. I have no external force applied to my model except initial velocity and gravity. the model is set to impact on a rigidwall Will the External Forces Work remains constant or increase or decrease?? THANKS in Advance Regards, SUBHU
  2. Hi, I'm trying to do a pressure analysis in a compressed gasket. I did a compression analysis of a gasket to generate a deformed gasket body using RADIOSS. Now, I need to add pressure on the selected areas of gasket in OptiStruc. I used MAT 1 with MATX 42 card for my material to run an nonlinear explicit dynamic analysis. But, I'm encountering this error message: *** ERROR # 4028 *** No load is defined in EXPDYN subcase 1. Looks like I'm not defining the load collector properly. Can anyone suggest me to resolve this error please? I'm attaching the model file to check. Thanks, Shawoon gasketdeformed.hm
  3. Dear all, I've given you the model setup in the attached image. Initially the assembly has to run at 2000 rpm along Z axis and then a torque of 800 Nm will be applied on the master pilot node of flange (the whole assembly is in rotating condition and then torque is applied on flange to compress the springs). This torque is an impact load acting in less than 50 ms. Kindly help me to setup the boundary condition. Here the guide and block should not move radially outwards. Only the spring and flange will have the radial expansion effect.
  4. Hello all ! This is my first post here, I'm a student doing my master thesis in Mechanical engineering. Here is my issue, I successfully did the tutorial in order to realize dynamic explicit analysis with the "full car" model available in Hypermesh database and also the " Example 51 - Optimization in RADIOSS for B-Pillar (Thickness optimization) " in order to understand how the ESL method works. The next step is to optimize the car crash box using he ESL method, my aim is to optimize the component called " COMP-PSHELL_1 " by Thickness optimization. I wrote the .radopt file but I encountered an issue with the .fem file. See below the error, I was not able to solve the issue. *** See next message about line 14864 from file: fullcarv5.fem "CONTACT,3,3,0,3" *** ERROR # 1000 *** in the input data: Incorrect data in field # 4. See attached the .radopt, the engine/stater file and the .fem file Thanks for your help ! Aub N. fullcarv5.fem fullcarv5.radopt fullcarv5_0000.rad fullcarv5_0001.rad
  5. In explosive analysis, I was able to see Burn Fraction time history plot by using variable 'BFRAC' under Output Block. How to see animation contours of such variables? What options should I change in the engine file to achieve this?
  6. Help with mass error and energy error

    Thank you George for the reply. So for any analysis until we use the control card for Implicit, will it always run an explicit analysis?? Also I have one more question, what is the error and mass error here ? CYCLE TIME TIME-STEP ELEMENT ERROR I-ENERGY K-ENERGY T K-ENERGY R EXT-WORK MAS.ERR 3500 0.3713E-02 0.1048E-05 SHELL 106239 0.1% 0.1060E+07 0.7229E+08 0.1347E+05 -0.2986E+06 0.000 Is it the error, the error of the external force to the internal force?
  7. Radioss Implicit/Explicit

    Hello, I know that Radioss is a solver which has both Implicit and Explicit solving scheme. I want to know when I solve a problem in Radioss which scheme is being used. Is there any way to select the method i.e. implicit or explicit when solving a problem? Thanks, Datta
  8. Sir, What if I do all preprocessing for a forming setup in any one of the HyperForm userprofiles and I want to export it to Abaqus Explicit Solver deck? Can I do that? I tried, however I found everything (material, loads, etc.) empty except for the parts (meshed instances) in Abaqus CAE- View Model GUI.
  9. Shock analysis

    Hello Everyone, I have a load curve for few miliseconds in terms of acceleration. I have to find the shock being transmitted through the body in terms acceleration. So is it correct to use transient analysis in Optistruct? or should I go with explicit using Radioss? Regards, Bharat
  10. Shock analysis

    Hello Everyone, I have a load curve for few miliseconds in terms of acceleration. I have to find the shock being transmitted through the body in terms acceleration. So is it correct to use transient analysis in Optistruct? or should I go with explicit using Radioss? Regards, Bharat
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